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Example

Enable the BPDU protect function for port 2:

TL-SG2424(config)# interface gigabitEthernet 2

TL-SG2424(config-if)# spanning-tree bpduguard

spanning-tree guard loop

Description

The spanning-tree guard loop command is used to enable the Loop Protect

function for a port. Loop Protect is to prevent the loops in the network brought by

recalculating STP because of link failures and network congestions. To disable

the Loop Protect function, please use no spanning-tree guard loop command.

Syntax

spanning-tree guard loop

no spanning-tree guard loop

Command Mode

Interface Configuration Mode (interface gigabitEthernet / interface range

gigabitEthernet)

Example

Enable the Loop Protect function for port 2:

TL-SG2424(config)# interface gigabitEthernet 1/0/2

TL-SG2424(config-if)# spanning-tree guard loop

spanning-tree guard root

Description

The spanning-tree guard root command is used to enable the Root Protect

function for a port. With the Root Protect function enabled, the root bridge will

set itself automatically as ERROR-PORT when receiving BPDU packets with

higher priority, in order to maintain the role of root ridge. To disable the Root

Protect function, please use no spanning-tree guard root command.

Syntax

spanning-tree guard root

no spanning-tree guard root

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